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Physical, chemical, and biological properties of white MTA with additions of AlF3

  • Marina Angélica Marciano
  • Josette Camilleri
  • Ribamar Lazanha Lucateli
  • Reginaldo Mendonça Costa
  • Mariza Akemi Matsumoto
  • Marco Antonio Hungaro Duarte
Original Article
  • 179 Downloads

Abstract

Objectives

Addition of aluminum fluoride (AlF3) to MTA was tested to inhibit dental discoloration.

Materials and methods

MTA Angelus with 0, 5, 15, and 45% AlF3 were tested. The set cements were characterized using scanning electron microscopy, energy-dispersive spectroscopy, and X-ray diffraction. Radiopacity and setting time were analyzed according to ANSI/ADA 57 and ASTM C266-08. Volume change was evaluated using volumetric micro-CT analysis. The pH and calcium ion release were assessed after 3 and 24 h and 28 days. Dental discoloration in contact with the cements was assessed after 24 h and 28 and 90 days of contact with bovine and human dentine. Tissue reaction to subcutaneous implantation in rats was examined after 30 and 60 days.

Results

AlF3 altered the microstructure of MTA. The addition of 5% AlF3 did not significantly alter the radiopacity, setting time, and volume change (p > 0.05). pH and calcium ion release significantly increased with addition of AlF3 (p > 0.05). All the tested proportions of AlF3 prevented the dental darkening verified for MTA Angelus in bovine and human teeth. AlF3 did not interfere in inflammatory response of MTA in all periods of analysis; otherwise, lower amounts showed less intense inflammatory infiltrate.

Clinical relevance

AlF3 prevents destabilization of bismuth oxide and consequent tooth darkening, frequently verified in clinical practice when using white MTA.

Conclusions

The use of 5% of AlF3 in combination to MTA resulted in a cement that did not result in dental discoloration and did not affect significantly physical, chemical, and biological properties.

Keywords

Cement Biomaterials Biocompatibility Color 

Notes

Acknowledgements

The authors thank Ing. James Camilleri from the Department of Metallurgy and Materials Engineering of the University of Malta for his assistance. ERDF (Malta) for the financing of the testing equipment throughout the project: “Developing an Interdisciplinary Material Testing and Rapid Prototyping R&D Facility (Ref. no. 012).”

Funding

This work was supported by the State of São Paulo Research Foundation (FAPESP 2014/01003-6, 2017/05096-7).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

Informed consent

For this type of study, formal consent is not required.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Marina Angélica Marciano
    • 1
  • Josette Camilleri
    • 2
  • Ribamar Lazanha Lucateli
    • 3
  • Reginaldo Mendonça Costa
    • 4
  • Mariza Akemi Matsumoto
    • 5
  • Marco Antonio Hungaro Duarte
    • 4
  1. 1.Department of Restorative Dentistry, Dental School of PiracicabaUniversity of Campinas - UNICAMPPiracicabaBrazil
  2. 2.School of DentistryUniversity of BirminghamBirminghamUnited Kingdom
  3. 3.Department of Surgery and Periodontology, Dental School of Ribeirão PretoUniversity of São Paulo – USPRibeirão PretoBrazil
  4. 4.Department of Dentistry, Endodontics and Dental Materials, Dental School of BauruUniversity of São Paulo – USPBauruBrazil
  5. 5.Department of Morphology, Dental School of AraçatubaState University of São Paulo – UNESPAraçatubaBrazil

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